Effect of Postdeposition Heat Treatment on the Crystallinity, Size, and Photocatalytic Activity of TiO_𝟐 Nanoparticles Produced via Chemical Vapour Deposition

Figure 5

TEM micrographs (left) and respective nanoparticle size distribution histograms (right) of TiO₂ nanoparticle samples deposited by MOCVD at (a) 700°C, (b) 700°C heat treated at 400°C, and (c) 700°C heat treated at 700°C.

(a) 700°C without heat treatment

(b) 700°C heat treated at 400°C

(c) 700°C heat treated at 400°C